Problem on numbers mcqs with answers pdf for Mathematics Preparation. Problem on numbers mcqs pdf download and Mathematics mcqs for entry test with answers pdf.
If ‘a’ denotes the unknown value and is increased by 2, the result will be 12 then the equation for this statement will be _____ ?
A. a = 12 + 2
B. a – 2 = 12
C. a + 2 = 12
D. 2a = 12Four handbags and three school bags costs $2000 and cost of handbag is thrice as much as schoolbags. If cost of school bag is ‘a’ then the derived equation will be _____ ?
A. 3(4a) + 3(3a) = 2000
B. 3(4a) – 3(3a) = 2000
C. 3(4a) – 3a = 2000
D. 3(4a) + 3a = 2000If four times of certain number ‘a’ is ten more than thrice the number then the equation derived for this statement can be written as ____ ?
A. 4a = 3a – 10
B. 4a = 3a + 10
C. 3a = 4a + 10
D. 3a = 4a – 10If the sum of two numbers is 33 and their difference is 15, the smaller number is _____ ?
A. 14
B. 18
C. 9
D. 12Then, x + y = 33 …(i)
and x – y = 15 …(ii)
Solving (i) and (ii), we get : x = 24, y = 9.
∴ Smaller number = 9.Sum of two numbers is 25 and their differenee is 13. Find their product _____ ?
A. 315
B. 325
C. 114
D. 104Let the numbers be x and y. Then, x + y = 25 and x – y = 13.
4xy = (x + y)2 – (x – y)2 = (25)2 – (13)2 = 625- 169 = 456
=> xy = 114.If the sum of a number and its square is 182, what is the number?
A. 13
B. 25
C. 15
D. 97Let the number be x.
Then, x + x2 = 182 x2 + x – 182 = 0
(x + 14) (x – 13) = 0 x = 13.Three numbers are in the ratio of 3 : 4 : 6 and their product is 1944. The largest of these numbers is ______ ?
A. 18
B. 12
C. 6
D. 34Then, 3x x 4x x 6x = 1944 72x3 = 1944
x3 = 27 ,=> x = 3
∴ Largest number = 6x = 18,Sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is ______ ?
A. 10
B. 15
C. 20
D. 30Find the number which when multiplied by 15 is increased by 196 ?
A. 37
B. 14
C. 20
D. 13A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is : ______ ?
A. 12
B. 34
C. 18
D. 24